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JAVASCRIPT Snippets.

Simple Rate Limiter for Outgoing API Requests

Implement a basic rate limiter in Node.js to control the frequency of outgoing API calls, preventing your application from exceeding external service rate limits.

Email Address Validation

Validate email addresses with a robust regular expression in JavaScript to ensure correct format for forms and user input, improving data quality.

URL Validation and Protocol Extraction

Validate full URLs, including protocol and optional path, and extract the protocol using JavaScript regex for link verification and parsing.

Password Strength Validation

Implement a JavaScript regex pattern to validate password strength, ensuring it meets minimum requirements like length, uppercase, lowercase, numbers, and special characters.

Extracting Hex Color Codes

Discover how to efficiently extract all valid hex color codes (3-digit or 6-digit) from any string using JavaScript regular expressions for styling or parsing.

Sanitizing Script Tags from User Input

Prevent basic Cross-Site Scripting (XSS) by removing script tags and their content from user input using a JavaScript regular expression for initial sanitization.

Vue 3 Programmatic Navigation with Vue Router 4

Implement programmatic navigation using `router.push`, `router.replace`, and `router.go` in Vue 3 applications with Vue Router 4 for dynamic route changes.

Vue 3 Custom Directive for Auto-Focus

Create a reusable custom Vue 3 directive to automatically focus an input element when a component is mounted or when the element becomes visible, improving UX.

Vue 3 Deep and Immediate Watchers

Master deep and immediate watchers in Vue 3's Composition API to effectively react to changes within nested reactive objects or trigger initial effects on data.

React useMediaQuery Hook for Responsive Designs

Dynamically adapt your React components based on CSS media queries, enabling responsive layouts and conditional rendering with ease.

React useWindowSize Hook to Track Browser Dimensions

Get real-time updates on the browser window's width and height in your React components, ideal for responsive UI adjustments.

React useIsomorphicLayoutEffect for SSR-Friendly Layout Effects

Use this custom hook to safely apply `useLayoutEffect` logic in both client-side and server-side rendering environments without warnings.